Severe Storms

WW 534 SEVERE TSTM SD 210230Z - 210800Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 534 NWS Storm Prediction Center Norman OK 830 PM MDT Sun Jul 20 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northwest South Dakota * Effective this Sunday night and Monday morning from 830 PM until 200 AM MDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Scattered large hail events to 1.5 inches in diameter possible SUMMARY...Thunderstorms currently over southeast Montana ad extreme northwest South Dakota will track across the watch area late this evening, posing a risk of locally damaging wind gusts and hail. The severe thunderstorm watch area is approximately along and 45 statute miles north and south of a line from 30 miles west southwest of Buffalo SD to 50 miles south southeast of Lemmon SD. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU4). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 531...WW 532...WW 533... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 28030. ...Hart Read more

MD 1745 CONCERNING SEVERE THUNDERSTORM WATCH 531...534... FOR SOUTHEAST MONTANA/SOUTHERN NORTH DAKOTA/NORTHERN SOUTH DAKOTA
Mesoscale Discussion 1745 NWS Storm Prediction Center Norman OK 1058 PM CDT Sun Jul 20 2025 Areas affected...Southeast Montana/southern North Dakota/northern South Dakota Concerning...Severe Thunderstorm Watch 531...534... Valid 210358Z - 210530Z The severe weather threat for Severe Thunderstorm Watch 531, 534 continues. SUMMARY...Severe wind/hail potential continues through late evening and possibly into the overnight from southeast Montana across southern North Dakota and northern South Dakota. Severe Thunderstorm Watches 531/534 continue, and the southern North Dakota/northern South Dakota border vicinity is being monitored for a possible additional Severe Thunderstorm Watch. DISCUSSION...Multiple storm clusters with a history of severe-caliber winds and/or hail persist from far southeast Montana (Carter County) to near the North Dakota/South Dakota border vicinity as of 1050pm CDT/950pm MDT. Steady boundary-layer cooling has occurred over the past couple of hours, and storms should ingest increasingly elevated inflow over the next few hours. However, existing storm organization and modest low-level jet influence should tend to sustain storms east-southeastward along the regional instability gradient. At least some severe-caliber wind/hail potential will probably continue into the overnight, and potentially into areas to the east of the current Watches 531/534 across far southern North Dakota and northern South Dakota. ..Guyer.. 07/21/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...ABR...BIS...UNR...BYZ... LAT...LON 45740506 46320426 46700255 46780055 45899863 44999936 44950195 45090437 45740506 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN Read more

WW 0534 Status Updates
STATUS REPORT ON WW 534 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1745 ..GUYER..07/21/25 ATTN...WFO...UNR... STATUS REPORT FOR WS 534 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS SDC019-063-093-105-137-210540- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BUTTE HARDING MEADE PERKINS ZIEBACH THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0531 Status Updates
STATUS REPORT ON WW 531 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 ENE 4BQ TO 30 WNW BHK TO 25 ESE DIK. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1745 ..GUYER..07/21/25 ATTN...WFO...BYZ...GGW...BIS... STATUS REPORT FOR WS 531 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC011-025-210540- MT . MONTANA COUNTIES INCLUDED ARE CARTER FALLON NDC001-011-037-041-085-087-210540- ND . NORTH DAKOTA COUNTIES INCLUDED ARE ADAMS BOWMAN GRANT HETTINGER SIOUX SLOPE THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0531 Status Updates
STATUS REPORT ON WW 531 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 65 W MLS TO 25 NNE BHK TO 25 SSE ISN. ..GUYER..07/21/25 ATTN...WFO...BYZ...GGW...BIS... STATUS REPORT FOR WS 531 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC011-017-025-075-087-103-210340- MT . MONTANA COUNTIES INCLUDED ARE CARTER CUSTER FALLON POWDER RIVER ROSEBUD TREASURE NDC001-007-011-025-033-037-041-053-085-087-089-210340- ND . NORTH DAKOTA COUNTIES INCLUDED ARE ADAMS BILLINGS BOWMAN DUNN GOLDEN VALLEY GRANT HETTINGER MCKENZIE SIOUX SLOPE STARK THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0532 Status Updates
STATUS REPORT ON WW 532 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 W MHN TO 10 NW VTN TO 30 NNE ANW. ..GUYER..07/21/25 ATTN...WFO...LBF...UNR...ABR... STATUS REPORT FOR WT 532 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC017-031-103-149-210340- NE . NEBRASKA COUNTIES INCLUDED ARE BROWN CHERRY KEYA PAHA ROCK THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0532 Status Updates
STATUS REPORT ON WW 532 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 W MHN TO 10 NW VTN TO 30 NNE ANW. ..GUYER..07/21/25 ATTN...WFO...LBF...UNR...ABR... STATUS REPORT FOR WT 532 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC017-031-103-149-210340- NE . NEBRASKA COUNTIES INCLUDED ARE BROWN CHERRY KEYA PAHA ROCK THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0532 Status Updates
STATUS REPORT ON WW 532 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 W MHN TO 10 NW VTN TO 30 NNE ANW. ..GUYER..07/21/25 ATTN...WFO...LBF...UNR...ABR... STATUS REPORT FOR WT 532 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC017-031-103-149-210340- NE . NEBRASKA COUNTIES INCLUDED ARE BROWN CHERRY KEYA PAHA ROCK THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0532 Status Updates
STATUS REPORT ON WW 532 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 W MHN TO 10 NW VTN TO 30 NNE ANW. ..GUYER..07/21/25 ATTN...WFO...LBF...UNR...ABR... STATUS REPORT FOR WT 532 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC017-031-103-149-210340- NE . NEBRASKA COUNTIES INCLUDED ARE BROWN CHERRY KEYA PAHA ROCK THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 532 TORNADO NE SD 202220Z - 210400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 532 NWS Storm Prediction Center Norman OK 420 PM MDT Sun Jul 20 2025 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of North Central Nebraska South Central South Dakota * Effective this Sunday afternoon and evening from 420 PM until 1000 PM MDT. * Primary threats include... A couple tornadoes possible Scattered large hail and isolated very large hail events to 2.5 inches in diameter likely Scattered damaging wind gusts to 70 mph possible SUMMARY...Isolated supercell thunderstorms are forming in a very unstable airmass. Very large hail, damaging winds, and a few tornadoes are possible with these storms through the evening. The tornado watch area is approximately along and 50 statute miles east and west of a line from 85 miles north of Valentine NE to 55 miles south southwest of Valentine NE. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && OTHER WATCH INFORMATION...CONTINUE...WW 530...WW 531... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 27025. ...Hart Read more

WW 0534 Status Updates
STATUS FOR WATCH 0534 HAS NOT BEEN ISSUED YET Read more

WW 0534 Status Updates
STATUS FOR WATCH 0534 HAS NOT BEEN ISSUED YET Read more

WW 0533 Status Updates
STATUS REPORT ON WW 533 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 N SLO TO 25 S BMG TO 40 ESE BMG TO 40 WNW LUK. ..DEAN..07/21/25 ATTN...WFO...ILX...PAH...IND...LMK... STATUS REPORT FOR WS 533 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC047-185-210340- IL . ILLINOIS COUNTIES INCLUDED ARE EDWARDS WABASH INC019-025-037-043-051-061-077-117-125-143-175-210340- IN . INDIANA COUNTIES INCLUDED ARE CLARK CRAWFORD DUBOIS FLOYD GIBSON HARRISON JEFFERSON ORANGE PIKE SCOTT WASHINGTON THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0533 Status Updates
STATUS REPORT ON WW 533 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 N SLO TO 25 S BMG TO 40 ESE BMG TO 40 WNW LUK. ..DEAN..07/21/25 ATTN...WFO...ILX...PAH...IND...LMK... STATUS REPORT FOR WS 533 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC047-185-210340- IL . ILLINOIS COUNTIES INCLUDED ARE EDWARDS WABASH INC019-025-037-043-051-061-077-117-125-143-175-210340- IN . INDIANA COUNTIES INCLUDED ARE CLARK CRAWFORD DUBOIS FLOYD GIBSON HARRISON JEFFERSON ORANGE PIKE SCOTT WASHINGTON THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0533 Status Updates
STATUS REPORT ON WW 533 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 N SLO TO 25 S BMG TO 40 ESE BMG TO 40 WNW LUK. ..DEAN..07/21/25 ATTN...WFO...ILX...PAH...IND...LMK... STATUS REPORT FOR WS 533 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC047-185-210340- IL . ILLINOIS COUNTIES INCLUDED ARE EDWARDS WABASH INC019-025-037-043-051-061-077-117-125-143-175-210340- IN . INDIANA COUNTIES INCLUDED ARE CLARK CRAWFORD DUBOIS FLOYD GIBSON HARRISON JEFFERSON ORANGE PIKE SCOTT WASHINGTON THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0533 Status Updates
STATUS REPORT ON WW 533 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 N SLO TO 25 S BMG TO 40 ESE BMG TO 40 WNW LUK. ..DEAN..07/21/25 ATTN...WFO...ILX...PAH...IND...LMK... STATUS REPORT FOR WS 533 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC047-185-210340- IL . ILLINOIS COUNTIES INCLUDED ARE EDWARDS WABASH INC019-025-037-043-051-061-077-117-125-143-175-210340- IN . INDIANA COUNTIES INCLUDED ARE CLARK CRAWFORD DUBOIS FLOYD GIBSON HARRISON JEFFERSON ORANGE PIKE SCOTT WASHINGTON THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 533 SEVERE TSTM IL IN 202310Z - 210500Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 533 NWS Storm Prediction Center Norman OK 610 PM CDT Sun Jul 20 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southeast Illinois Southern Indiana * Effective this Sunday night from 610 PM until Midnight CDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...A cluster of intense thunderstorms has formed in southeast Illinois. These storms are expected to track southeastward this evening across the watch area. Damaging winds are the main concern. The severe thunderstorm watch area is approximately along and 40 statute miles north and south of a line from 30 miles south southwest of Mattoon IL to 30 miles north northeast of Louisville KY. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU3). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 530...WW 531...WW 532... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 29030. ...Hart Read more

MD 1744 CONCERNING SEVERE THUNDERSTORM WATCH 531... FOR SOUTHEAST MONTANA/SOUTHWEST NORTH DAKOTA AND FAR NORTHWEST SOUTH DAKOTA
Mesoscale Discussion 1744 NWS Storm Prediction Center Norman OK 0755 PM CDT Sun Jul 20 2025 Areas affected...Southeast Montana/Southwest North Dakota and far northwest South Dakota Concerning...Severe Thunderstorm Watch 531... Valid 210055Z - 210230Z The severe weather threat for Severe Thunderstorm Watch 531 continues. SUMMARY...Potential for large hail and severe-caliber wind gusts will continue across southeast Montana and southwest North Dakota, and possibly into far northwest South Dakota. DISCUSSION...A few isolated supercells persist as of 750pm CDT/650pm MDT particularly across southwest North Dakota within the primary instability axis, while other clusters of storms have begun to evolve and organize across southeast Montana south of I-94 and near/east of I-90. Miles City, MT measured a 59 kt/68 mph wind gust around 550pm MDT, while Big Horn County Airport more recently measured a 75 mph gust. While episodic large hail will continue regionally, severe-wind potential should somewhat focus across far southeast Montana into far southwest North Dakota (potentially including the Baker and Bowman areas), and possibly into far northwest South Dakota over the next few hours as additional cell mergers/upscale growth likely occurs. ..Guyer.. 07/21/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...ABR...BIS...UNR...BYZ...GGW... LAT...LON 45830756 46930693 47140365 46560172 45790135 45470201 45170575 45830756 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN Read more

MD 1742 CONCERNING SEVERE THUNDERSTORM WATCH 533... FOR PARTS OF SOUTHERN IL/IN INTO NORTHERN KY
Mesoscale Discussion 1742 NWS Storm Prediction Center Norman OK 0736 PM CDT Sun Jul 20 2025 Areas affected...Parts of southern IL/IN into northern KY Concerning...Severe Thunderstorm Watch 533... Valid 210036Z - 210200Z The severe weather threat for Severe Thunderstorm Watch 533 continues. SUMMARY...Damaging wind and perhaps a brief tornado remain possible this evening. DISCUSSION...A compact bowing segment has developed and is moving into southwest IN as of 0030 UTC. This bowing segment is moving quickly east-southeastward along a surface boundary and instability gradient, and will pose a threat of at least localized wind damage for as long as it persists this evening. Other semi-discrete convection has developed both ahead of this bowing cluster, and in its wake across south-central IL. With MLCAPE of 1500-2500 J/kg and effective shear of 25-35 kt, organized convection will remain possible through the evening, including potential for occasional supercell structures. Warm temperatures aloft and weak midlevel lapse rates may tend to limit the magnitude of the severe threat to some extent, but locally damaging wind and perhaps a brief tornado cannot be ruled out with any persistent discrete cells. Any additional upscale-growing clusters could pose a threat for more concentrated wind damage, though in the absence of stronger low-level flow, this potential is uncertain. ..Dean.. 07/21/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...JKL...ILN...LMK...IND...PAH...ILX...LSX... LAT...LON 39638955 39298730 38998516 38918419 38498364 38188446 37938546 38108677 38278806 38598936 39178943 39638955 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH Read more

WW 0531 Status Updates
STATUS REPORT ON WW 531 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1744 ..GUYER..07/21/25 ATTN...WFO...BYZ...GGW...BIS... STATUS REPORT FOR WS 531 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC011-017-021-025-033-055-075-079-083-087-103-109-210240- MT . MONTANA COUNTIES INCLUDED ARE CARTER CUSTER DAWSON FALLON GARFIELD MCCONE POWDER RIVER PRAIRIE RICHLAND ROSEBUD TREASURE WIBAUX NDC001-007-011-025-033-041-053-087-089-210240- ND . NORTH DAKOTA COUNTIES INCLUDED ARE ADAMS BILLINGS BOWMAN DUNN GOLDEN VALLEY HETTINGER MCKENZIE SLOPE STARK THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES Read more